Add RSC-based static site generator #4228

Job	Run time
Benchmarks	10m 46s
Flow	58s
Lint	57s
Integration tests (ubuntu-latest, Node 18)	8m 36s
Build REPL	6m 31s
Integration tests (macos-latest, Node 18)	10m 2s
TypeScript types	1m 34s
Integration tests (windows-latest, Node 18)	18m 23s
Unit tests (ubuntu-latest, Node 18)	2m 33s
Integration tests (ubuntu-latest, Node 20)	7m 54s
Unit tests (macos-latest, Node 18)	3m 9s
Integration tests (macos-latest, Node 20)	9m 15s
Unit tests (windows-latest, Node 18)	10m 57s
Integration tests (windows-latest, Node 20)	17m 23s
Unit tests (ubuntu-latest, Node 20)	2m 25s
Unit tests (macos-latest, Node 20)	2m 58s
Unit tests (windows-latest, Node 20)	12m 49s
	2h 7m 10s

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